Barrera-Figueroa, Victor, Sosa-Pedroza, Jorge, López-Bonilla, José (2006) Multiple root finder algorithm for Legendre and Chebyshev polynomials via Newton’s method Annales Mathematicae et Informaticae. 33. pp. 3-13. ISSN 1787-5021 (Print), 1787-6117 (Online)